Cat. No. I526-E1-1 USER S MANUAL 3G3IV-PLKEB2 /4. Braking Resistor Units 3G3IV-PCDBR2 B/4 B. Braking Units
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1 Cat. No. I526-E1-1 USER S MANUAL 3G3IV-PLKEB2 /4 Braking Resistor Units 3G3IV-PCDBR2 B/4 B Braking Units
2 Thank you for choosing an OMRON Braking Resistor Unit and Braking Unit. Proper use and handling of the product will ensure proper product performance, will length product life, and may prevent possible accidents. Please read this manual thoroughly and handle and operate the product with care. Please keep this manual in a safe place. The 3G3IV-PLKEB2 /4 Braking Resistor Units and the 3G3IV-PCDBR2 B/4 B Braking Units are designed to increase the braking capabilities of a SYSDRIVE system when using a general-purpose SYSDRIVE Inverter to drive a 3-phase motor. The Braking Resistor Unit works by consuming regenerative energy from the motor when decelerating. NOTICE 1. This manual describes the functions of the product and relations with other products. You should assume that anything not described in this manual is not possible. If you intend on using the product in devices or systems relating to atomic power control, transportation, combustion devices, medical equipment, amusement rides, safety devices, or in other applications directly related to human life, allow sufficient leeway in rating and performance, install fail-safe systems and other safety measures, confirm specifications, and consult with your OMRON representative in advance. 2. Although care has been given in documenting the product, please contact your OMRON representative if you have any suggestions on improving this manual. 3. The product contains potentially dangerous parts under the covers. Do not use the product with the covers open. Doing so may result in injury or death and may damage the product. Never attempt to repair or disassemble the product. 4. We recommend that you add the following precautions to any instruction manuals you prepare for the system into which the product is being installed. Precautions on the dangers of high-voltage equipment. Precautions on touching the terminals of the product. 5. Specifications and functions may be changed without notice in order to improve product performance. Items to Check Before Unpacking Check the following items before removing the product from the package: Has the correct product been delivered (i.e., the correct model number and specifications)? Has the product been damaged in shipping? Are any screws or bolts loose?
3 Notice: OMRON products are manufactured for use according to proper procedures by a qualified operator and only for the purposes described in this manual. The following conventions are used to indicate and classify precautions in this manual. Always heed the information provided with them. Failure to heed precautions can result in injury to people or damage to the product. WARNING Indicates information that, if not heeded, could possibly result in loss of life or serious injury. Caution Indicates information that, if not heeded, could result in relatively serious or minor injury, damage to the product, or faulty operation. OMRON Product References OMRON products are capitalized in this manual. The word Unit is also capitalized when it refers to an OMRON product, regardless of whether or not it appears in the proper name of the product. Visual Aids The following headings appear in the left column of the manual to help you locate different types of information. Note Indicates information of particular interest for efficient and convenient operation of the product. OMRON, 1998 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission of OMRON. No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is constantly striving to improve its high-quality products, the information contained in this manual is subject to change without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in this publication.
4 Product Confirmation Caution Do not install or operate a Braking Unit or Braking Resistor Unit that is damaged or is missing parts. Doing so may result in injury. Transportation and Installation Caution Do not hold the Unit by the front cover when carrying it. Always hold the bottom of the case. If the Unit is held by the cover, the main body of the Unit may fall, possibly resulting in injury. Caution Do not install a Unit near flammable objects. The Unit generates heat and may cause fire if installed near flammable objects. Caution Install cooling fans or other means of cooling when installing more than one Unit in the same enclosure to ensure that the temperature of the air entering a Braking Resistor Unit or Braking Unit is 40 C maximum. Fire or other accidents may be caused by overheating. Caution Do not conduct withstand voltage test on a Braking Resistor Unit or Braking Unit. Doing so may damage semiconductor elements inside the Units. Wiring WARNING Always confirm that the input power supply is OFF before wiring a Braking Resistor Unit or Braking Unit. Wiring a Unit while the power is being supplied may result in electric shock or fire. WARNING The Braking Resistor Unit and Braking Unit have high-voltage terminals, which can be extremely dangerous if touched. Do not touch the terminals. Touching these terminals may result in electric shock. WARNING Allow wiring work to be performed only by a qualified electrician. Improper wiring may result in electric shock or fire. WARNING Always ground the ground terminal properly to a ground resistance of 100 Ω maximum for 200 V-class systems and to a ground resistance of 10 Ω maximum for 400 V-class systems. Caution The thermal relays on the Braking Resistor Units and Braking Units must be wired to circuits that will stop Inverter operation. Always check the wiring and check operation after completing wiring work. (The user is responsible for wiring.) Fire may result if these relays are not connected properly. Caution Do not allow physical stress to be applied to the wiring. Physical stress on the wiring can cause broken wires or contact faults, possibly resulting in fire.
5 Caution Confirm that the power supply voltage is the same as the rated voltage of the Braking Resistor Units and Braking Units. (Check the setting of the power supply selection connector on the Braking Units.) Incorrect power supply voltages may result in injury or fire. Caution Tighten all terminals to the specified tightening torque. Improperly tightened terminals may result in fire. Operation WARNING Always attach the front cover before turning ON the power supply and do not remove the front cover while power is being supplied. Operating without the front cover in place may result in electric shock. Caution Do not touch the cooling fins and discharge resistors, which become very hot. Touching the cooling fins or discharge resistors may result in burns. Caution Although the Braking Resistor Unit and Braking Unit are set to the normal settings at the factory, you must check the settings according to the contents of the manual and change any settings as required by the system before starting operation. Operating with incorrect settings may result in burns or fire. Inspection and Maintenance WARNING The Braking Resistor Unit and Braking Unit have high-voltage terminals, which can be extremely dangerous if touched. Do not touch the terminals. Touching these terminals may result in electric shock. WARNING Always keep the protective covers attached while power is being supplied and use a MCCB to interrupt the power supply before removing a protective cover. Having the protective cover removed while power is supplied may result in electric shock. WARNING After turning OFF the main power supply, always confirm that the charge indicator turns OFF before performing any inspection or maintenance work. The capacitors will retain a charge and can cause electric shock if not completely discharged. WARNING Allow maintenance, inspections, and part replacements to be performed only by specified personnel. Remove all metal objects (watches, wrist bands, etc.) before starting work and use insulated tools. Improper or unqualified work may result in electric shock. WARNING Do not change wiring, attach a connector, or remove a connector while power is being supplied. Doing so may result in electric shock. Caution Internal boards contain CMOS ICs, which must be handled with care. Do not touch these boards or ICs directly with your bare hands. Static electricity from your hands may destroy the ICs.
6 Caution Periodically check the operation of the circuits that stop Inverter operation with the thermal relays on the Braking Resistor Units and Braking Units. Functional failure (e.g., malfunction of the thermal relays, broken wiring, contact faults, etc.) may result in fire. Other WARNING Never attempt to modify a Unit in any way. Doing so may result in electric shock or injury.
7 Table of Contents Chapter 1. Comparison to Previous Models Chapter 2. Installation Installation Site Precautions Braking Unit Mounting Dimensions Braking Resistor Unit Mounting Dimensions Chapter 3. Braking Unit Covers Removing and Replacing the Terminal Cover Removing and Replacing the Inner Cover Chapter 4. Nomenclature Braking Unit Braking Resistor Unit Chapter 5. Wiring Wiring Lead-in Method Separation from Signal Lines Wiring Distance Grounding Wiring between Units Chapter 6. Settings Power Supply Selection Connector Master/Slave Selection Connector Chapter 7. Connecting Braking Units in Parallel Chapter 8. Operation Chapter 9. Troubleshooting Chapter 10. Specifications Braking Unit Braking Resistor Unit Application List Braking Unit Specifications Braking Resistor Unit Specifications i
8 1 Chapter 1 Comparison to Previous Models
9 Comparison to Previous Models Chapter 1 The following table lists the differences between Braking Unit models. Item Previous models New models Model 3G3IV-PCDBR2015 3G3IV-PCDBR2022 3G3IV-PCDBR4030 3G3IV-PCDBR4045 3G3IV-PCDBR2015B 3G3IV-PCDBR2022B 3G3IV-PCDBR4030B 3G3IV-PCDBR4045B Dimensions (W H D) mm mm Weight 15 kg 1.8 kg Terminal labels N P P 0 B 0 Position of power supply voltage selection tap --- Refer to Chapter 4 Nomenclature. Terminal layout --- Refer to Chapter 4 Nomenclature. Note There are no changes to the Braking Resistor Unit in comparison to previous models. o 1-2
10 2 Chapter 2 Installation 2-1 Installation Site Precautions 2-2 Braking Unit Mounting Dimensions 2-3 Braking Resistor Unit Mounting Dimensions
11 Installation Chapter Installation Site Precautions Do not install the Braking Unit or Baking Resistor Unit in locations subject to the following conditions: Rain, water drops, or oil drops Direct sunlight Harmful gases or liquids Excessive dust, salt, or iron particles Excessive vibration Temperatures or humidities outside of the specified ranges Excessive electromagnetic noise, such as occurs near welding machines Radioactive materials Flammable materials To take full advantage of the functions of the Braking Unit and Braking Resistor Unit, install the Units in a location satisfying the following conditions: Ensure that there is sufficient space between the Units and surrounding objects, as shown in the installation diagram. The Braking Resistor Unit generates heat. Provide sufficient space between the Units and devices that are sensitive to heat. Install the Units in the orientation shown in the installation diagrams. 2-2 Braking Unit Mounting Dimensions Mounting direction Up 4, M4 mounting holes 100 min. Unit: mm 30 min. 30 min. Three, lead wire outlets (22-dia. rubber bushing) 100 min. Installation Diagram 2-2
12 Installation Chapter 2 The terminal labels have changed between previous Braking Unit models and the new Baking Unit models as shown in the following table. Item Previous models (3G3IV-PCDBR ) Terminal labels N P P 0 o B 0 New models (3G3IV-PCDBR B) 2-3 Braking Resistor Unit Mounting Dimensions Braking Resistor Units for 0.4 to 7.5-kW Inverters Mounting Up direction Mounting holes for E a: 3G3IV-PLKEB20P7/40P7 b: 3G3IV-PLKEB21P5 to 27P5 and 41P5 to 47P5 ba b 150 min. Unit: mm 30 min. 30 min. 150 min. Braking Resistor Dimensions in mm Weight Unit Model in kg 3G3IV-PLKEB A B C D E 200 V 20P M5 3.0 class 21P M P M P M P M P M V 40P M5 3.0 class 41P M P M P M P M P M
13 Installation Chapter 2 Braking Resistor Units for 11 to 45-kW Inverters Mounting direction Up Mounting holes for E 200 min. Unit: mm 50 min. 50 min. 200 min. Braking Resistor Dimensions in mm Weight Unit model in kg 3G3IV-PLKEB A B C D E 200 V M8 10 class M M M V M6 16 class M M M M M M
14 3 Chapter 3 Braking Unit Covers 3-1 Removing and Replacing the Terminal Cover 3-2 Removing and Replacing the Inner Cover
15 Braking Unit Covers Chapter Removing and Replacing the Terminal Cover To remove the terminal cover, grasp the cover at (1) on both sides and then lift in the direction of (2). To replace the cover, reverse the procedure. (1) Terminal cover (2) (1) 3-2 Removing and Replacing the Inner Cover To remove the inner cover, remove the terminal cover first, then press down on the lever in the direction of (1) and lift the cover in the direction of (2). To replace the cover, reverse the procedure. Lever (2) Inner cover (1) 3-2
16 4 Chapter 4 Nomenclature 4-1 Braking Unit 4-2 Braking Resistor Unit
17 Nomenclature Chapter Braking Unit 3G3IV-PCDBR2015B Braking Unit (Example) Note The diagram shows the Unit with the terminal cover and inner cover removed. Power supply selection connector Master/Slave selection connector Calibration resistor (Adjusted prior to shipment) Operation indicator (Lights when discharging.) External terminals 1 to 6 Charge indicator External terminals,, o, 0 Lead wire outlet (3 places with rubber bushes) Circuits and Wiring Specifications Circuits Terminal labels Wire size in mm 2 (AWG) Main circuits,, o, to 5.5 (12 to 10) Control 1, 2, 3, 4, 5, to 2 circuits (18 to 14) Wire type 600-V vinyl sheathed wire Terminal Tightening screws torque in N m M
18 Nomenclature Chapter Braking Resistor Unit 3G3IV-PLKEB20P7 to 27P5 and 3G3IV-PLKEB40P7 to 4015 Braking Resistor Units Note The diagram shows the Unit with the front cover removed. Thermal overload relay (automatically reset) Lead wire outlet (rubber bush) External terminals B, P, 1, 2 Circuits and Wiring Specifications Circuits Terminal labels Wire size in mm 2 (AWG) Main circuits B, P 3.5 to 5.5 (12 to 10) Control 1, to 2 circuits (18 to 14) Wire type 600-V vinyl sheathed wire Terminal Tightening screws torque in N m M4 1.2 M4 4-3
19 Nomenclature Chapter 4 3G3IV-PLKEB2011 to 2022 and 3G3IV-PLKEB4018 to 4045 Braking Resistor Units Note The diagram shows the Unit with the front cover removed. Resistor Thermal overload protector Lead wire outlet (rubber bush) External terminals B, P, 1, 2 Circuits and Wiring Specifications Circuits Terminal labels Wire size in mm 2 (AWG) Main circuits B, P 3.5 to 5.5 (12 to 10) Control 1, to 2 circuits (18 to 14) Wire type 600-V vinyl sheathed wire Terminal screws Tightening torque in N m M5 2.0 M
20 5 Chapter 5 Wiring 5-1 Wiring Lead-in Method 5-2 Separation from Signal Lines 5-3 Wiring Distance 5-4 Grounding 5-5 Wiring between Units
21 Wiring Chapter Wiring Lead-in Method Lead in the wires through the knockout holes at the Unit bottom. The knockout holes are provided with rubber bushes; cut the rubber bush crosswise in the middle with a blade and lead the wires through. 5-2 Separation from Signal Lines A strong noise component is superimposed on the Braking Resistor Unit and Braking Unit wiring. Separate the Units from signal lines that are sensitive to noise. 5-3 Wiring Distance The wiring distance between the Braking Resistor Unit and Braking Unit or Braking Unit and Inverter must as shown in the following diagram. Make sure to bundle the wires between the Units. Braking Resistor Unit Braking Unit Inverter 10 m max. 5 m max. 5-4 Grounding Mount the Braking Resistor Unit to a grounded metallic plate. When the Unit cannot be mounted to a grounded metallic plate, pull out the lead wire from the mounting screw section to ground. The Braking Unit ground terminal must be provide with a class-3 ground (ground resistance: 100 Ω max.) for 200 V-class Inverters and a special class-3 ground (ground resistance: 10 Ω max.) for 400 V-class Inverters. Use the sizes specified in the Internal Connection Specifications (see note) for ground cables. Note The Internal Connection Specifications is for use in Japan. Use the size of ground cable specified in local regulations. 5-2
22 Wiring Chapter Wiring between Units The following diagrams show examples of wiring between the Braking Unit, Braking Resistor Unit, and Inverter. Thoroughly read the information on the previous page and confirm that all wiring is designed and executed correctly. Note Even if a non-omron braking resistor unit is used, it must be provided with thermal overload relay protection. Connecting the Braking Resistor Unit 200 V class:200 to 230 VAC, single-phase, 50/60 Hz 400 V class:380 to 460VAC, threephase, 50/60 Hz Power supply See note. XA Inverter Thermal relay trip contacts Braking Resistor Unit Note Connect a 400/200 transformer for 400 V-class Inverters. 5-3
23 Wiring Chapter 5 Connecting the Braking Unit and Braking Resistor Unit 200 V class:200 to 230 VAC, single-phase, 50/60 Hz 400 V class:380 to 460VAC, threephase, 50/60 Hz Power supply Inverter See note. Voltage selection Braking Resistor Unit Braking Unit Thermal relay trip contacts Thermal relay trip contacts Note Connect a 400/200 transformer for 400 V-class Inverters. 5-4
24 6 Chapter 6 Settings 6-1 Power Supply Selection Connector 6-2 Master/Slave Selection Connector
25 Settings Chapter 6 There is no need to adjust the Braking Unit or Braking Resistor Unit. Do not perform any adjustments to the Units except to set the power supply selection connector on the Braking Unit. 6-1 Power Supply Selection Connector The power supply selection connector may need to be changed depending on the power supply voltage of the main circuits. The relationship between the power supply voltage and the settings of the selection connector is shown in the following tables. Set the connector in the correct position for the power supply voltage being used. The factory setting is as follows: 200 V class: 220 V 400 V class: 440 V Refer to Chapter 3 Braking Unit Covers for information on removing the terminal cover and inner cover. 200 V class power supply voltage Braking start voltage (PN bus bar voltage) 230 V 380 V (typical) 220 V 365 V (typical) 208 V 345 V (typical) 200 V 330 V (typical) 400 V class power supply voltage Braking start voltage (PN bus bar voltage) 460 V 760 V (typical) 440 V 730 V (typical) 415 V 690 V (typical) 400 V 660 V (typical) 380 V 630 V (typical) Note 1. The allowable voltage fluctuation is ±10%. Note 2. The diagram shows the Unit with the terminal cover and inner covers removed. 200 V class 200 V 208 V 220 V 230 V 400 V class 380 V 400 V 415 V 440 V 460 V 6-2
26 Settings Chapter Master/Slave Selection Connector The Unit is factory-set as a master. The Unit can normally be used without changing the setting of this connector. The slave setting is used when connecting Braking Units in parallel so that the braking start voltages are the same. Refer to Chapter 7 Connecting Braking Units in Parallel for details. 6-3
27 7 Chapter 7 Connecting Braking Units in Parallel
28 Connecting Braking Units in Parallel Chapter 7 When connecting two or more Braking Units in parallel, connect the Units and set the master/slave selection connector as follows: Braking Units have a master/slave selection connector. Set the selection connecter to the master setting on only one of the Braking Units (Braking Unit 1, below). Set the selection connector to the slave setting on the other Braking Units (Braking Units 2 and 3, below). Connect the thermal relays on the Braking Resistor Units in parallel and the thermal relays on the Braking Units in parallel. Wire correctly according to instructions in 5-5 Wiring between Units. Use twisted-pair wires of 1 m or less to connect terminals 5 and 6 to terminals 1 and 2 of the Braking Units. Up to 10 Braking Units can be wired in parallel. Thermal relay trip contacts Thermal relay trip contacts Thermal relay trip contacts Inverter Braking Resistor Unit Braking Resistor Unit Braking Resistor Unit Braking Unit 1 Braking Unit 2 Braking Unit 3 Thermal relay trip contacts Thermal relay trip contacts Thermal relay trip contacts 7-2
29 8 Chapter 8 Operation
30 Operation Chapter 8 Confirm that the desired braking characteristics are being obtained. The operation indicator on the Braking Unit will light when the Unit is operating. Use this indicator to confirm operation. High Voltages WARNING High voltages are present both inside the Braking Unit and on the terminal block. Always operate the Unit with the covers attached. Operation without the covers attached presents an immediate danger of electric shock. Parameters The following Inverter parameters must be set when using a Braking Resistor Unit. 3G3FV-series Inverters Set L8-01 (DB resistor protection) to 0 (Disabled: Braking resistor is not used or the Braking Resistor Unit is used). Set L3-04 (Stall prevention during deceleration) to 0 (Disabled: Deceleration as set). 3G3HV-series Inverters Set n079 (DB resistor protection) to 0 (Disabled: Braking resistor is not used or the Braking Resistor Unit is used). Set n070 (Stall prevention during deceleration) to 0 (Disabled: Deceleration as set). 3G3EV-series Inverters Set n33 (Stall prevention during deceleration) to 1 (Disabled: Deceleration as set). Note 1. L8-01 or n079 is enabled when using a braking resistor without thermal relay trip contacts. Note 2. Stall prevention (L3-04, n070, or n33) is enabled when a Braking Resistor Unit is not used and the deceleration time can not be reduced. 8-2
31 9 Chapter 9 Troubleshooting
32 Troubleshooting Chapter 9 Fault status Cause Corrective action Without Braking Unit Replace the Inverter. Braking Resistor Unit overload relay (or thermal overload protector) trips when not decelerating. Inverter trips at overvoltage (OV). Braking Resistor Unit overload relay (or thermal protector) sometimes trips. Braking Unit trips due to heat sink overheat. The main circuit discharge transistor in the Inverter is short circuited. With Braking Unit The main circuit discharge transistor in the Braking Unit is short circuited. Improper Braking Unit power supply selection connector setting (The power supply voltage is greater than the voltage set on the power supply voltage selection connector.) Insufficient Braking Resistor Unit capacity Improper wiring Braking Unit fault Insufficient Braking Resistor Unit capacity Excessive start/stop switching frequency Excessive load inertia Improper combination of Braking Unit and Braking Resistor Unit Ambient temperature above 40 C Replace the Unit. Set the power supply selection connector again. Check the braking conditions again. Check and repair the wiring. Replace the Unit. Check the braking conditions again. Check the operating conditions again. Check the combination. Reduce the ambient temperature. 9-2
33 10 Chapter 10 Specifications 10-1 Braking Unit Braking Resistor Unit Application List 10-2 Braking Unit Specifications 10-3 Braking Resistor Unit Specifications
34 Specifications Chapter Braking Unit Braking Resistor Unit Application List 200 V Class Voltage 200 V to 230 V Inverter Braking Unit Braking Resistor Unit Braking Number Resistor Number torque used specifications used (10% ED) % Max. applicable Motor Unit HP (kw) Model 3G3IV- PCDBR B Model 3G3IV- PLKEB 0.4 (0.5) P7 70 W 200 Ω 0.75 (1) P7 70 W 200 Ω 1.5 (2) P5 260 W 100 Ω 2.2 (3) P2 260 W 70 Ω 3.7 (5) P7 390 W 40 Ω 5.5 (7.5) P5 520 W 30 Ω 7.5 (10) P5 780 W 20 Ω 11 (15) ,400 W 13.6 Ω 15 (20) ,000 W 10 Ω 18.5 (25) ,800 W 8 Ω 22 (30) ,800 W 6.8 Ω 30 (40) ,800 W 10 Ω 37 (50) ,000 W 10 Ω 45 (60) ,800 W 6.8 Ω 55 (75) ,800 W 6.8 Ω 75 (100) ,800 W 6.8 Ω
35 Specifications Chapter 10 Inverter Braking Unit Braking Resistor Unit Braking Voltage Max. applicable 3G3IV- used 3G3IV- specifica- used (10% ED) Model Number Model Resistor Number torque Motor Unit PCDBR PLKEB tions % HP (kw) B 380 V to 0.4 (0.5) P7 70 W V 750 Ω 0.75 (1) P7 70 W Ω 1.5 (2) P5 260 W Ω 2.2 (3) P2 260 W Ω 3.7 (5) P7 390 W Ω 5.5 (7.5) P5 520 W Ω 7.5 (10) P5 780 W Ω 11 (15) ,040 W Ω 15 (20) ,560 W Ω 18.5 (25) ,800 W Ω 22 (30) ,800 W Ω 30 (40) ,000 W Ω 37 (50) ,600 W Ω 45 (60) ,600 W Ω 55 (75) ,000 W Ω 75 (100) W Ω 110 (150) ,000 W Ω 160 (200) ,600 W Ω 185 (250) ,600 W Ω 220 (300) ,600 W Ω 300 (400) ,600 W 13.6 Ω
36 Specifications Chapter Braking Unit Specifications Voltage 200 V class 400 V class Model 2015B 2022B 4030B 4045B 3G3IV-PCDBR Output Max. applicable motor character- capacity (kw) istics Max. discharge current (A) (peak value) (see note) Rated discharge current (A) (continuous) Braking start voltage 330/345/365/380 V±3 V 630/660/690/730/760 V ±6 V Max. hysteresis Approx. 8 V Approx. 16 V Power supply VDC 243 ( ) to 400 V peak 400 ( ) to 800 V peak Protective Cooling fins overheating Thermostat functions Power charging indicator Charging indicator stays ON until bus voltage drops below 50 V. Environ- Location Indoor (without no corrosive gases or dust) mental Ambient temperature 10 to 40 C (no icing) conditions Storage temperature 20 to 60 C Humidity 90% RH (no condensation) Vibration 9.8 m/s 2 (1G) at 10 to 20 Hz 2 m/s 2 (0.2G) at 20 to 50 Hz Degree of protective Wall-mounted enclosed structure (NEMA1) Heat loss (W) Note Loading time rate for the maximum discharge current must be 10% ED or less for a maximum of 10 sec. 10-4
37 Specifications Chapter Braking Resistor Unit Specifications Model 3G3IV- PLKEB Specifications Allowable average power consumption (W) Allowable average current (effective value) (A) Allowable ambient temperature 20P7 200 V 700 W 200 Ω to 50 C 21P5 class 260 W 100 Ω P2 260 W 70 Ω P7 390 W 40 Ω P5 520 W 30 Ω P5 780 W 20 Ω ,400 W 13.6 Ω ,000 W 10 Ω ,800 W 8 Ω , Ω P7 400 V 70 W 750 Ω P5 class 260 W 400 Ω P2 260 W 250 Ω P7 390 W 150 Ω P5 520 W 100 Ω P5 780 W 75 Ω ,040 W 50 Ω ,560 W 40 Ω ,800 W 32 Ω ,800 W 27.2 Ω ,000 W 20 Ω 1, ,600 W 16 Ω 1, ,600 W 13.6 Ω 1,
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